System and method for full duplex cancellation
First Claim
1. A method comprising:
- determining a passive suppression of an interference signal, based on a previously estimated passive suppression stored in a database;
generating a negative estimate of the interference signal;
adding the negative estimate to the interference signal, to yield a residual interference signal; and
applying digital cancellation to the residual interference signal based on the passive suppression.
1 Assignment
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Accused Products
Abstract
Disclosed herein are systems, methods, and computer-readable storage media for enabling improved cancellation of self-interference in full-duplex communications, or the transmitting and receiving of communications in a single frequency band without requiring time, frequency, or code divisions. The system estimates the signal strength and phase of a self-interference signal, generates a cancellation signal based on this estimate, then uses the cancellation signal to suppress the self-interference before sampling received analog signal. After applying the cancellation signal, the system samples and digitizes the remaining analog signal. The digitized signal is then subjected to additional digital cancellation, allowing for extraction of the desired signal.
36 Citations
20 Claims
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1. A method comprising:
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determining a passive suppression of an interference signal, based on a previously estimated passive suppression stored in a database; generating a negative estimate of the interference signal; adding the negative estimate to the interference signal, to yield a residual interference signal; and applying digital cancellation to the residual interference signal based on the passive suppression. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system comprising:
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a processor; and a computer-readable storage medium having instructions stored which, when executed by the processor, cause the processor to perform operations comprising; determining a passive suppression of an interference signal, based on a previously estimated passive suppression stored in a database; generating a negative estimate of the interference signal; adding the negative estimate to the interference signal, to yield a residual interference signal; and applying digital cancellation to the residual interference signal based on the passive suppression. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A computer-readable storage device having instructions stored which, when executed by a computing device, cause the computing device to perform operations comprising:
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determining a passive suppression of an interference signal, based on a previously estimated passive suppression stored in a database; generating a negative estimate of the interference signal; adding the negative estimate to the interference signal, to yield a residual interference signal; and applying digital cancellation to the residual interference signal based on the passive suppression. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification